usr/src/lib/gss_mechs/mech_krb5/krb5/krb/appdefault.c

   1 /*
   2  * appdefault - routines designed to be called from applications to
   3  *               handle the [appdefaults] profile section
   4  */
   5
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include "k5-int.h"
   9
  10
  11
  12  /*xxx Duplicating this is annoying; try to work on a better way.*/
  13 static const char *const conf_yes[] = {
  14         "y", "yes", "true", "t", "1", "on",
  15         0,
  16 };
  17
  18 static const char *const conf_no[] = {
  19         "n", "no", "false", "nil", "0", "off",
  20         0,
  21 };
  22
  23 static int conf_boolean(char *s)
  24 {
  25         const char * const *p;
  26         for(p=conf_yes; *p; p++) {
  27                 if (!strcasecmp(*p,s))
  28                         return 1;
  29         }
  30         for(p=conf_no; *p; p++) {
  31                 if (!strcasecmp(*p,s))
  32                 return 0;
  33         }
  34         /* Default to "no" */
  35         return 0;
  36 }
  37
  38 static krb5_error_code appdefault_get(krb5_context context, const char *appname, const krb5_data *realm, const char *option, char **ret_value)
  39 {
  40         profile_t profile;
  41         const char *names[5];
  42         char **nameval = NULL;
  43         krb5_error_code retval;
  44         const char * realmstr =  realm?realm->data:NULL;
  45
  46             if (!context || (context->magic != KV5M_CONTEXT))
  47             return KV5M_CONTEXT;
  48
  49             profile = context->profile;
  50
  51         /*
  52          * Try number one:
  53          *
  54          * [appdefaults]
  55          *      app = {
  56          *              SOME.REALM = {
  57          *                      option = <boolean>
  58          *              }
  59          *      }
  60          */
  61
  62         names[0] = "appdefaults";
  63         names[1] = appname;
  64
  65         if (realmstr) {
  66                 names[2] = realmstr;
  67                 names[3] = option;
  68                 names[4] = 0;
  69                 retval = profile_get_values(profile, names, &nameval);
  70                 if (retval == 0 && nameval && nameval[0]) {
  71                         *ret_value = strdup(nameval[0]);
  72                         goto goodbye;
  73                 }
  74         }
  75
  76         /*
  77          * Try number two:
  78          *
  79          * [appdefaults]
  80          *      app = {
  81          *              option = <boolean>
  82          *      }
  83          */
  84
  85         names[2] = option;
  86         names[3] = 0;
  87         retval = profile_get_values(profile, names, &nameval);
  88         if (retval == 0 && nameval && nameval[0]) {
  89                 *ret_value = strdup(nameval[0]);
  90                 goto goodbye;
  91         }
  92
  93         /*
  94          * Try number three:
  95          *
  96          * [appdefaults]
  97          *      realm = {
  98          *              option = <boolean>
  99          */
 100
 101         if (realmstr) {
 102                 names[1] = realmstr;
 103                 names[2] = option;
 104                 names[3] = 0;
 105                 retval = profile_get_values(profile, names, &nameval);
 106                 if (retval == 0 && nameval && nameval[0]) {
 107                         *ret_value = strdup(nameval[0]);
 108                         goto goodbye;
 109                 }
 110         }
 111
 112         /*
 113          * Try number four:
 114          *
 115          * [appdefaults]
 116          *      option = <boolean>
 117          */
 118
 119         names[1] = option;
 120         names[2] = 0;
 121         retval = profile_get_values(profile, names, &nameval);
 122         if (retval == 0 && nameval && nameval[0]) {
 123                 *ret_value = strdup(nameval[0]);
 124         } else {
 125                 return retval;
 126         }
 127
 128 goodbye:
 129         if (nameval) {
 130                 char **cpp;
 131                 for (cpp = nameval; *cpp; cpp++)
 132                         free(*cpp);
 133                 free(nameval);
 134         }
 135         return 0;
 136 }
 137
 138 void KRB5_CALLCONV
 139 krb5_appdefault_boolean(krb5_context context, const char *appname, const krb5_data *realm, const char *option, int default_value, int *ret_value)
 140 {
 141         char *string = NULL;
 142         krb5_error_code retval;
 143
 144         retval = appdefault_get(context, appname, realm, option, &string);
 145
 146         if (! retval && string) {
 147                 *ret_value = conf_boolean(string);
 148                 free(string);
 149         } else
 150                 *ret_value = default_value;
 151 }
 152
 153 void KRB5_CALLCONV
 154 krb5_appdefault_string(krb5_context context, const char *appname, const krb5_data *realm, const char *option, const char *default_value, char **ret_value)
 155 {
 156         krb5_error_code retval;
 157         char *string;
 158
 159         retval = appdefault_get(context, appname, realm, option, &string);
 160
 161         if (! retval && string) {
 162                 *ret_value = string;
 163         } else {
 164                 *ret_value = strdup(default_value);
 165         }
 166 }